Fix formatting in underscore.coffee documentation (generated html)

Use docco to regenerate documentation for underscore.coffee. Per @ruanp suggestion, screenshots are attached. The syntax highlighting, alignment, and responsive formatting have been fixed.

## Before
![broken](https://f.cloud.github.com/assets/1577682/1051297/88363f9e-10c8-11e3-868f-5d2a28f0ad7d.jpg)

## After

![fixed](https://f.cloud.github.com/assets/1577682/1051299/927659bc-10c8-11e3-9415-bd4a9daf4392.jpg)